Are there any fm transmitter circuits out there that do not require a trimmer cap? I have been to every local electronics shop in town, and no'one has them!

Thanks
Warden

Thu Apr 24, 2003 9:50 pm

SpeedsterGuest

hi warden,

just to test, you can substitue trimmer cap by one capacitance that is in the range of the trimmer, but who will not vary the emitter frequency...

Speedster

Fri Jul 18, 2003 8:12 pm

fmdreamNew registered user

Joined: 27 Jul 2003Posts: 3Location: Croatia/Dalmatia/Zadar

Without trimer cap's YES!

You may build a fm exciter without any trimer capacitors! Most commercial exciters (up to 20 Watts) no need trimer. You can use a bgy33 or bgy133 from Philips (hibrid amplifier). Input for this device is 100~150mW output 0~20 Watts on 87.5~108mHz. It's very simple!

Sun Jul 27, 2003 10:16 pm

StormiNormGuest

TRUE THAT

When was the last time you Bought or was able to find a BGY133 AVAILABLE??

Open This link: http://www.*Ads not allowed*/modules.php?name=Downloads&d_op=getit&lid=24 to get technical manuals from PTEK Broadcast manufacturer. In this manual you will get the schematics of fm exciter and power amplifier without any trimer capacitors or hibrid module....